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HID: elo: clear BTN_LEFT mapping 

[ Upstream commit 9abd04af95 ]

ELO devices have one Button usage in GenDesk field, which makes hid-input map
it to BTN_LEFT; that confuses userspace, which then considers the device to be
a mouse/touchpad instead of touchscreen.

Fix that by unmapping BTN_LEFT and keeping only BTN_TOUCH in place.

Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
pull/10/head
Jiri Kosina 2017-11-22 11:19:51 +01:00 committed by Greg Kroah-Hartman
parent addf1ae9fc
commit f0ab595c2d
1 changed files with 6 additions and 0 deletions
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6
drivers/hid/hid-elo.c
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@ -42,6 +42,12 @@ static int elo_input_configured(struct hid_device *hdev,
{
struct input_dev *input = hidinput->input;
/*
* ELO devices have one Button usage in GenDesk field, which makes
* hid-input map it to BTN_LEFT; that confuses userspace, which then
* considers the device to be a mouse/touchpad instead of touchscreen.
*/
clear_bit(BTN_LEFT, input->keybit);
set_bit(BTN_TOUCH, input->keybit);
set_bit(ABS_PRESSURE, input->absbit);
input_set_abs_params(input, ABS_PRESSURE, 0, 256, 0, 0);